Study on the Luminescence Properties according to ZnS multi-phase

ZnS multi-phase에 따른 발광특성 연구

  • 김광복 (고려아연(주) 기술연구소) ;
  • 김용일 (한국표준과학연구원 소재특성평가센터) ;
  • 천희곤 (울산대학교 정보전자공학부) ;
  • 조동율 (울산대학교 정보전자공학부) ;
  • 구경완 (영동대학 정보전자공학부)
  • Published : 2001.01.01

Abstract

The crystal structure of ZnS fabricated by gas-liquid phase reaction was refined by the Rietveld program using X-ray diffraction data. The R-weighted pattern (R$\sub$wp/) of ZnS powder was 10.85%. The fraction of HCP phase was closely related with extra amount of H$_2$S gas. The lattice parameters and crystalline size were changed by the relative ratio of multi-phase. The luminescence property of ZnS:Cu, Al green phosphors prepared by conventional methods was good in the range of 91∼94% and 150∼190${\AA}$, respectively. According to the maximum entropy electron density(MEED) methods, any defects in (001) plane of cubic phase were not found. We suggest that both the Rietveld and maximum entropy density methods may be useful tools for studying luminescence mechanism of other phosphors materials.

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